Nice idea, but that isn't nearly as nice as what this article shows. I'm not going to buy two separate controller setups for my iPad and iPhone. The one above will cover both, which makes it awesome.

But I see the appeal of that mock up too. Handheld is a nice touch.

The iCade Mobile is handheld also. And has 2 more buttons. And cheaper at the moment since it doesn't fit the iPhone 5. (I assume) It says compatibility with certain models, but that's about the shape, the BT compatibility should be universal for iOS devices. Link was above a few posts.

Tried my new 8 bitty today, it works ok for some icade games, but other times they have the controls mapped weird. I would also prefer an analog joystick, as I dislike dpad controls for movement as it is hard to go diagonal with them vs analog sticks.